Dirichlet divisor problem exponent (63a)

Dirichlet divisor problem exponent

63a

Upper bound, last-listed row

| $131/416$ | [Hux2003] | Record exponent (as stated in survey literature). [Tsa2010-ub-131-416] |

exact pinned row

| $131/416$ | <a href="#Hux2003">[Hux2003]</a> | Record exponent (as stated in survey literature). <a href="#Tsa2010-ub-131-416">[Tsa2010-ub-131-416]</a> |

tracked since 2026-07-24 — no movement seen yet

Lower bound, last-listed row

| $1/4$ | [Tsa2010] | Omega results imply $\alpha\ge 1/4$. [Tsa2010-omega-1-4] |

exact pinned row

| $1/4$ | <a href="#Tsa2010">[Tsa2010]</a> | Omega results imply $\alpha\ge 1/4$. <a href="#Tsa2010-omega-1-4">[Tsa2010-omega-1-4]</a> |

tracked since 2026-07-24 — no movement seen yet

Cite this row

Bounds Ledger — Dirichlet divisor problem exponent (63a)
upper bound: $131/416$ (tracked since 2026-07-24 — no movement seen yet)
lower bound: $1/4$ (tracked since 2026-07-24 — no movement seen yet)
Mirrored from teorth/optimizationproblems@2c1968c. These are the last-listed rows of that constant's bounds table — a listing position, not a statement that this bound is the strongest or most recent. A snapshot at that sha, not a live read.
https://u00dxk2.github.io/bounds-ledger/c/63a.html